565 lines
20 KiB
C
565 lines
20 KiB
C
#include "ad7124.h"
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#include "user_spi.h"
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#include "usart.h"
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#include <stdint.h>
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#include <stdbool.h>
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#include <string.h>
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/* Error codes */
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#define INVALID_VAL -1 /* Invalid argument */
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#define COMM_ERR -2 /* Communication error on receive */
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#define AD7124_TIMEOUT -3 /* A timeout has occured */
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int32_t FINESH_ID;
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int32_t g_ad7124_id;
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// 配置ad7124寄存器的值，根据实际项目需求配置
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ad7124_st_reg_t ad7124_regs[AD7124_REG_NO] = {
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{AD7124_STATUS, 0x00, AD7124_SIZE_1, AD7124_R}, /* AD7124_Status */
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{AD7124_ADC_CONTROL, 0x0680, AD7124_SIZE_2, AD7124_RW}, /* AD7124_ADC_Control - Enable reference, chip select, and data status */
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{AD7124_DATA, 0x000000, AD7124_SIZE_3, AD7124_R}, /* AD7124_Data */
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{AD7124_IOCON1, 0x000000, AD7124_SIZE_3, AD7124_RW}, /* AD7124_IOCon1 */
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{AD7124_IOCON2, 0x0000, AD7124_SIZE_2, AD7124_RW}, /* AD7124_IOCon2 */
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{AD7124_ID, 0x02, AD7124_SIZE_1, AD7124_R}, /* AD7124_ID */
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{AD7124_ERROR, 0x000000, AD7124_SIZE_3, AD7124_R}, /* AD7124_Error */
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{AD7124_ERROR_EN, 0x000040, AD7124_SIZE_3, AD7124_RW}, /* AD7124_Error_En */
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{AD7124_MCLK_COUNT, 0x00, AD7124_SIZE_1, AD7124_R}, /* AD7124_Mclk_Count */
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{AD7124_CHANNEL_0, 0x0051, AD7124_SIZE_2, AD7124_RW}, /* AD7124_Channel_0 */
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{AD7124_CHANNEL_1, 0x0071, AD7124_SIZE_2, AD7124_RW}, /* AD7124_Channel_1 */
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{AD7124_CHANNEL_2, 0x0091, AD7124_SIZE_2, AD7124_RW}, /* AD7124_Channel_2 */
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{AD7124_CHANNEL_3, 0x00B1, AD7124_SIZE_2, AD7124_RW}, /* AD7124_Channel_3 */
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{AD7124_CHANNEL_4, 0x00D1, AD7124_SIZE_2, AD7124_RW}, /* AD7124_Channel_4 */
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{AD7124_CHANNEL_5, 0x00F1, AD7124_SIZE_2, AD7124_RW}, /* AD7124_Channel_5 */
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{AD7124_CHANNEL_6, 0x0111, AD7124_SIZE_2, AD7124_RW}, /* AD7124_Channel_6 */
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{AD7124_CHANNEL_7, 0x0131, AD7124_SIZE_2, AD7124_RW}, /* AD7124_Channel_7 */
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{AD7124_CHANNEL_8, 0x0151, AD7124_SIZE_2, AD7124_RW}, /* AD7124_Channel_8 */
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{AD7124_CHANNEL_9, 0x0171, AD7124_SIZE_2, AD7124_RW}, /* AD7124_Channel_9 */
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{AD7124_CHANNEL_10, 0x0001, AD7124_SIZE_2, AD7124_RW}, /* AD7124_Channel_10 */
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{AD7124_CHANNEL_11, 0x0001, AD7124_SIZE_2, AD7124_RW}, /* AD7124_Channel_11 */
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{AD7124_CHANNEL_12, 0x0001, AD7124_SIZE_2, AD7124_RW}, /* AD7124_Channel_12 */
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{AD7124_CHANNEL_13, 0x0001, AD7124_SIZE_2, AD7124_RW}, /* AD7124_Channel_13 */
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{AD7124_CHANNEL_14, 0x0001, AD7124_SIZE_2, AD7124_RW}, /* AD7124_Channel_14 */
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{AD7124_CHANNEL_15, 0x0001, AD7124_SIZE_2, AD7124_RW}, /* AD7124_Channel_15 */
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{AD7124_CONFIG_0, 0x0DE0, AD7124_SIZE_2, AD7124_RW}, /* AD7124_Config_0 - Enable buffers and internal reference */
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{AD7124_CONFIG_1, 0x0040, AD7124_SIZE_2, AD7124_RW}, /* AD7124_Config_1 */
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{AD7124_CONFIG_2, 0x0860, AD7124_SIZE_2, AD7124_RW}, /* AD7124_Config_2 */
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{AD7124_CONFIG_3, 0x0860, AD7124_SIZE_2, AD7124_RW}, /* AD7124_Config_3 */
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{AD7124_CONFIG_4, 0x0860, AD7124_SIZE_2, AD7124_RW}, /* AD7124_Config_4 */
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{AD7124_CONFIG_5, 0x0860, AD7124_SIZE_2, AD7124_RW}, /* AD7124_Config_5 */
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{AD7124_CONFIG_6, 0x0860, AD7124_SIZE_2, AD7124_RW}, /* AD7124_Config_6 */
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{AD7124_CONFIG_7, 0x0860, AD7124_SIZE_2, AD7124_RW}, /* AD7124_Config_7 */
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{AD7124_FILTER_0, 0x060020, AD7124_SIZE_3, AD7124_RW}, /* AD7124_Filter_0 */
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{AD7124_FILTER_1, 0x060180, AD7124_SIZE_3, AD7124_RW}, /* AD7124_Filter_1 */
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{AD7124_FILTER_2, 0x060180, AD7124_SIZE_3, AD7124_RW}, /* AD7124_Filter_2 */
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{AD7124_FILTER_3, 0x060180, AD7124_SIZE_3, AD7124_RW}, /* AD7124_Filter_3 */
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{AD7124_FILTER_4, 0x060180, AD7124_SIZE_3, AD7124_RW}, /* AD7124_Filter_4 */
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{AD7124_FILTER_5, 0x060180, AD7124_SIZE_3, AD7124_RW}, /* AD7124_Filter_5 */
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{AD7124_FILTER_6, 0x060180, AD7124_SIZE_3, AD7124_RW}, /* AD7124_Filter_6 */
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{AD7124_FILTER_7, 0x060180, AD7124_SIZE_3, AD7124_RW}, /* AD7124_Filter_7 */
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{AD7124_OFFSET_0, 0x800000, AD7124_SIZE_3, AD7124_RW}, /* AD7124_Offset_0 */
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{AD7124_OFFSET_1, 0x800000, AD7124_SIZE_3, AD7124_RW}, /* AD7124_Offset_1 */
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{AD7124_OFFSET_2, 0x800000, AD7124_SIZE_3, AD7124_RW}, /* AD7124_Offset_2 */
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{AD7124_OFFSET_3, 0x800000, AD7124_SIZE_3, AD7124_RW}, /* AD7124_Offset_3 */
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{AD7124_OFFSET_4, 0x800000, AD7124_SIZE_3, AD7124_RW}, /* AD7124_Offset_4 */
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{AD7124_OFFSET_5, 0x800000, AD7124_SIZE_3, AD7124_RW}, /* AD7124_Offset_5 */
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{AD7124_OFFSET_6, 0x800000, AD7124_SIZE_3, AD7124_RW}, /* AD7124_Offset_6 */
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{AD7124_OFFSET_7, 0x800000, AD7124_SIZE_3, AD7124_RW}, /* AD7124_Offset_7 */
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{AD7124_GAIN_0, 0x500000, AD7124_SIZE_3, AD7124_RW}, /* AD7124_Gain_0 */
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{AD7124_GAIN_1, 0x500000, AD7124_SIZE_3, AD7124_RW}, /* AD7124_Gain_1 */
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{AD7124_GAIN_2, 0x500000, AD7124_SIZE_3, AD7124_RW}, /* AD7124_Gain_2 */
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{AD7124_GAIN_3, 0x500000, AD7124_SIZE_3, AD7124_RW}, /* AD7124_Gain_3 */
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{AD7124_GAIN_4, 0x500000, AD7124_SIZE_3, AD7124_RW}, /* AD7124_Gain_4 */
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{AD7124_GAIN_5, 0x500000, AD7124_SIZE_3, AD7124_RW}, /* AD7124_Gain_5 */
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{AD7124_GAIN_6, 0x500000, AD7124_SIZE_3, AD7124_RW}, /* AD7124_Gain_6 */
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{AD7124_GAIN_7, 0x500000, AD7124_SIZE_3, AD7124_RW}, /* AD7124_Gain_7 */
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};
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ad7124_st_reg_t ad7124_channel_regs[AD7124_CHANNEL_EN_MAX] = {
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{AD7124_CHANNEL_0, 0x8051, AD7124_SIZE_2, AD7124_RW}, /* AD7124_Channel_0 */
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{AD7124_CHANNEL_1, 0x8071, AD7124_SIZE_2, AD7124_RW}, /* AD7124_Channel_1 */
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{AD7124_CHANNEL_2, 0x8091, AD7124_SIZE_2, AD7124_RW}, /* AD7124_Channel_2 */
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{AD7124_CHANNEL_3, 0x80B1, AD7124_SIZE_2, AD7124_RW}, /* AD7124_Channel_3 */
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{AD7124_CHANNEL_4, 0x80D1, AD7124_SIZE_2, AD7124_RW}, /* AD7124_Channel_4 */
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{AD7124_CHANNEL_5, 0x80F1, AD7124_SIZE_2, AD7124_RW}, /* AD7124_Channel_5 */
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{AD7124_CHANNEL_6, 0x8111, AD7124_SIZE_2, AD7124_RW}, /* AD7124_Channel_6 */
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{AD7124_CHANNEL_7, 0x8131, AD7124_SIZE_2, AD7124_RW}, /* AD7124_Channel_7 */
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{AD7124_CHANNEL_8, 0x8151, AD7124_SIZE_2, AD7124_RW}, /* AD7124_Channel_8 */
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{AD7124_CHANNEL_9, 0x8171, AD7124_SIZE_2, AD7124_RW}, /* AD7124_Channel_9 */
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};
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ad7124_analog_t ad7124_analog[AD7124_CHANNEL_EN_MAX] = {NULL}; // AD通道采样结构体数组，用于存放AD通道采样数据
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/**
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* @brief 无校验读取AD7124寄存器
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*
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* 读取AD7124的寄存器值，不进行校验。
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*
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* @param p_reg 指向要读取的寄存器结构的指针
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*
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* @return 读取成功返回0，失败返回负值
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*/
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int32_t ad7124_no_check_read_register(ad7124_st_reg_t *p_reg)
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{
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int32_t ret = 0;
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uint8_t buffer[8] = {0, 0, 0, 0, 0, 0, 0, 0};
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uint8_t add_status_length = 0;
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uint8_t i = 0; // 添加变量声明
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// 构建命令字
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buffer[0] = AD7124_COMM_REG_RD | AD7124_COMM_REG_RA(p_reg->addr);
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// 打印调试信息
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// char uart_buf[100];
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// sprintf(uart_buf, "Reading register 0x%02X, command: 0x%02X\r\n", p_reg->addr, buffer[0]);
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// HAL_UART_Transmit(&huart1, (uint8_t*)uart_buf, strlen(uart_buf), 100);
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if ((p_reg->addr == AD7124_DATA) &&
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(ad7124_regs[AD7124_ADC_CONTROL].value & AD7124_ADC_CTRL_REG_DATA_STATUS))
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{
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add_status_length = 1;
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}
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// 从设备读取数据
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ret = ad7124_read_write_spi(buffer, p_reg->size + 1 + add_status_length);
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if (ret < 0)
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return ret;
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// 解析数据（buffer[1]开始为有效数据）
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// if (p_reg->size == 1) {
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// p_reg->value = buffer[1];
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// } else if (p_reg->size == 2) {
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// p_reg->value = ((uint16_t)buffer[1] << 8) | buffer[2];
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// } else if (p_reg->size == 3) {
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// p_reg->value = ((uint32_t)buffer[1] << 16) | ((uint32_t)buffer[2] << 8) | buffer[3];
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// } else {
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// p_reg->value = 0;
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// }
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p_reg->value = 0;
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for (i = 1; i < p_reg->size + 1; i++)
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{
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p_reg->value <<= 8;
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p_reg->value += buffer[i];
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}
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if (add_status_length)
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{
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ad7124_regs[AD7124_STATUS].value = buffer[p_reg->size + 1];
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}
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// 仅用于调试：如果是ID寄存器，赋值到全局变量
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if (p_reg->addr == AD7124_ID) {
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g_ad7124_id = p_reg->value;
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}
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return ret;
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}
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/**
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* @brief 向AD7124寄存器写入数据，不进行校验
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*
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* 将数据写入指定的AD7124寄存器，不进行数据校验。
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*
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* @param reg 指向要写入数据的寄存器地址和值的指针
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* @return 写入结果，成功返回0，失败返回负值
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*/
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int32_t ad7124_no_check_write_register(ad7124_st_reg_t *reg)
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{
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int32_t ret = 0;
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int32_t reg_value = 0;
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uint8_t wr_buf[8] = {0, 0, 0, 0, 0, 0, 0, 0};
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uint8_t i = 0;
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/* Build the Command word */
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wr_buf[0] = AD7124_COMM_REG_WEN | AD7124_COMM_REG_WR |
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AD7124_COMM_REG_RA(reg->addr);
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/* Fill the write buffer */
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reg_value = reg->value;
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for (i = 0; i < reg->size; i++)
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{
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wr_buf[reg->size - i] = reg_value & 0xFF;
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reg_value >>= 8;
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}
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/* Write data to the device */
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ret = ad7124_read_write_spi(wr_buf, reg->size + 1);
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FINESH_ID = ret;
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return ret;
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}
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/**
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* @brief 从AD7124寄存器读取数据
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*
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* 该函数用于从AD7124的指定寄存器中读取数据。
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*
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* @param p_reg 指向一个ad7124_st_reg_t类型的指针，其中包含了要读取的寄存器的地址。
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*
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* @return 返回读取到的数据，如果读取失败则返回负数。
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*
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* 在读取寄存器之前，会先检查ERROR寄存器的SPI_IGNORE_ERR位
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*/
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int32_t ad7124_read_register(ad7124_st_reg_t *p_reg)
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{
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int32_t ret;
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// 检查寄存器地址是否不是错误地址，并且检查ERROR寄存器的SPI_IGNORE_ERR位是否被设置
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if (p_reg->addr != AD7124_ERROR && (ad7124_regs[AD7124_ERROR_EN].value & AD7124_ERREN_REG_SPI_IGNORE_ERR_EN))
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{
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// 读寄存器之前检查ERROR寄存器的SPI_IGNORE_ERR位
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ret = ad7124_wait_for_spi_ready(AD7124_RDY);
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// 如果等待SPI就绪失败，则返回错误码
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if (ret < 0)
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return ret;
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}
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// 不检查ERROR寄存器的SPI_IGNORE_ERR位，直接读取寄存器
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ret = ad7124_no_check_read_register(p_reg);
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return ret;
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}
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/**
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* @brief 向AD7124寄存器写入数据
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*
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* 将数据写入AD7124的指定寄存器。如果错误寄存器中启用了忽略SPI错误的功能，则在写入前会等待SPI接口准备就绪。
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*
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* @param p_reg 指向要写入数据的寄存器结构体的指针
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*
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* @return 返回写入操作的结果。如果操作成功，则返回0；否则返回负数表示错误。
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*/
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int32_t ad7124_write_register(ad7124_st_reg_t *p_reg)
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{
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int32_t ret;
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if ((ad7124_regs[AD7124_ERROR_EN].value & AD7124_ERREN_REG_SPI_IGNORE_ERR_EN))
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{
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ret = ad7124_wait_for_spi_ready(AD7124_RDY);
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if (ret < 0)
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return ret;
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}
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ret = ad7124_no_check_write_register(p_reg);
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return ret;
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}
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/**
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* @brief 重置AD7124设备
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*
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* 该函数通过SPI接口向AD7124发送重置命令，并等待设备完成上电过程。
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*
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* @return 返回函数执行结果，成功返回0，失败返回错误码。
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*/
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int32_t ad7124_reset(void)
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{
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int32_t ret = 0;
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uint8_t wr_buf[8] = {0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF}; // 发送64个1，复位ad7124芯片
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ret = ad7124_read_write_spi(wr_buf, 8);
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/* Read POR bit to clear */
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ret = ad7124_wait_to_power_on(AD7124_RDY);
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return ret;
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}
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/**
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* @brief 等待SPI接口准备就绪
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*
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* 等待AD7124的SPI接口准备就绪，直到超时。
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*
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* @param timeout 超时时间（单位：毫秒）
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* @return 成功返回0，超时返回AD7124_TIMEOUT
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*/
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int32_t ad7124_wait_for_spi_ready(uint32_t timeout)
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{
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int32_t ret;
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int8_t ready = 0;
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while (!ready && --timeout)
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{
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/* Read the value of the Error Register */
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ret = ad7124_read_register(&ad7124_regs[AD7124_ERROR]);
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if (ret < 0)
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return ret;
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/* Check the SPI IGNORE Error bit in the Error Register */
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ready = (ad7124_regs[AD7124_ERROR].value &
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AD7124_ERR_REG_SPI_IGNORE_ERR) == 0;
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}
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return timeout ? 0 : AD7124_TIMEOUT;
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}
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/**
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* @brief 等待AD7124电源开启
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*
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* 此函数将等待AD7124设备电源开启，直到超时或检测到电源开启标志。
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*
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* @param timeout 超时时间
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*
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* @return 返回0表示成功，返回AD7124_TIMEOUT表示超时
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*/
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int32_t ad7124_wait_to_power_on(uint32_t timeout)
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{
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int32_t ret;
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int8_t powered_on = 0;
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while (!powered_on && timeout--)
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{
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ret = ad7124_read_register(&ad7124_regs[AD7124_STATUS]);
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if (ret < 0)
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return ret;
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/* Check the POR_FLAG bit in the Status Register */
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powered_on = (ad7124_regs[AD7124_STATUS].value &
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AD7124_STATUS_REG_POR_FLAG) == 0;
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}
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return (timeout || powered_on) ? 0 : AD7124_TIMEOUT;
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}
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/**
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* @brief 等待AD7124转换准备就绪
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*
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* 该函数等待AD7124完成转换并准备就绪。如果等待超时，则返回错误码。
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*
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* @param timeout 超时时间
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* @return 成功时返回0，超时时返回AD7124_TIMEOUT
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*/
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int32_t ad7124_wait_for_conv_ready(uint32_t timeout)
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{
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int32_t ret;
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int8_t ready = 0;
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while (!ready && --timeout)
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{
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/* Read the value of the Status Register */
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ret = ad7124_read_register(&ad7124_regs[AD7124_STATUS]);
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if (ret < 0)
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return ret;
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/* Check the RDY bit in the Status Register */
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ready = (ad7124_regs[AD7124_STATUS].value &
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AD7124_STATUS_REG_RDY) == 0;
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}
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return timeout ? 0 : AD7124_TIMEOUT;
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}
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/**
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* @brief 从AD7124读取数据
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*
|
||
* 从AD7124的数据寄存器中读取数据值。
|
||
*
|
||
* @return 读取到的数据值
|
||
*/
|
||
int32_t ad7124_read_data(void)
|
||
{
|
||
int32_t read_data;
|
||
/* Read the value of the Status Register */
|
||
ad7124_read_register(&ad7124_regs[AD7124_DATA]);//读取数据寄存器
|
||
/* Get the read result */
|
||
read_data = ad7124_regs[AD7124_DATA].value;
|
||
|
||
return read_data;
|
||
}
|
||
/**
|
||
* @brief 从AD7124获取模拟信号数据
|
||
*
|
||
* 该函数通过SPI接口从AD7124芯片获取模拟信号数据，并将数据保存到ad7124_analog中。
|
||
*
|
||
* @details
|
||
* - 遍历所有模拟通道，对每个通道执行以下操作：
|
||
* - 等待AD7124完成转换。
|
||
* - 读取转换后的数据。
|
||
* - 计算电压值（单极性计算公式）。
|
||
* - 计算电流值（基于电压值和电阻值），有的通道没有电流值可以忽略。
|
||
*
|
||
* @note
|
||
* - 转换完成后，通过公式计算电压和电流值，并将结果保存到全局数组ad7124_analog中。
|
||
* - 电压计算公式：Code = (0xFFFFFF × AIN × Gain)/VREF，其中VREF为参考电压，GAIN为增益，AD_CODE为AD代码。
|
||
* - 电流计算公式：电流 = 电压 / 电阻 * 1000，其中电阻值为AD7124_RES，单位转换为mA。
|
||
*/
|
||
// void ad7124_get_analog(void)
|
||
// {
|
||
// int32_t read_data;
|
||
// uint8_t i;
|
||
// uint8_t channel;
|
||
// // for (i = STOP_NC_ADC; i < AD7124_CHANNEL_EN_MAX; i++)
|
||
// // {
|
||
// // ad7124_regs[AD7124_CHANNEL_0].value = ad7124_channel_regs[i].value;
|
||
// // ad7124_write_register(&ad7124_regs[AD7124_CHANNEL_0]);
|
||
|
||
// // ad7124_read_register(&ad7124_regs[AD7124_STATUS]);
|
||
// while (ad7124_wait_for_conv_ready(AD7124_RDY))
|
||
// ; // 等待转换完成
|
||
// channel = ad7124_regs[AD7124_STATUS].value;
|
||
// ad7124_analog[channel].channel = channel;
|
||
// read_data = ad7124_read_data();
|
||
// ad7124_analog[channel].data = read_data;
|
||
// ad7124_analog[channel].voltage = (float)(read_data * VREF / GAIN / AD_CODE); // AD7124单极性计算公式：Code = (0xFFFFFF × AIN × Gain)/VREF
|
||
// ad7124_analog[channel].current = (float)(ad7124_analog[channel].voltage / AD7124_RES * 1000); // 乘1000是为了将单位转换为mA
|
||
|
||
// // ad7124_regs[AD7124_CHANNEL_0].value = 0;
|
||
// // ad7124_write_register(&ad7124_regs[AD7124_CHANNEL_0]);
|
||
// // }
|
||
// }
|
||
void ad7124_get_analog(uint8_t channel_nr)
|
||
{
|
||
int32_t read_data;
|
||
|
||
// 设置AD7124寄存器，选择指定通道
|
||
// for (i = STOP_NC_ADC; i < AD7124_CHANNEL_EN_MAX; i++)
|
||
// {
|
||
ad7124_regs[AD7124_CHANNEL_0].value = ad7124_channel_regs[channel_nr].value;
|
||
ad7124_write_register(&ad7124_regs[AD7124_CHANNEL_0]);
|
||
|
||
// 等待转换完成
|
||
while (ad7124_wait_for_conv_ready(AD7124_RDY))
|
||
; // 等待转换完成
|
||
|
||
// 存储读取的模拟数据
|
||
ad7124_analog[channel_nr].channel = channel_nr;
|
||
read_data = ad7124_read_data();
|
||
ad7124_analog[channel_nr].data = read_data;
|
||
|
||
// 计算电压值
|
||
// AD7124单极性计算公式：Code = (0xFFFFFF × AIN × Gain)/VREF
|
||
ad7124_analog[channel_nr].voltage = (float)(read_data * VREF / GAIN / AD_CODE);
|
||
|
||
// 计算电流值，乘1000是为了将单位转换为mA
|
||
ad7124_analog[channel_nr].current = (float)(ad7124_analog[channel_nr].voltage / AD7124_RES * 1000);
|
||
|
||
// 恢复通道0寄存器为默认值
|
||
ad7124_regs[AD7124_CHANNEL_0].value = 0;
|
||
ad7124_write_register(&ad7124_regs[AD7124_CHANNEL_0]);
|
||
// }
|
||
}
|
||
/**
|
||
* @brief 配置AD7124设备
|
||
*
|
||
* 该函数负责初始化AD7124设备，初始化寄存器。
|
||
*
|
||
* @return 初始化结果，成功返回0，失败返回负数
|
||
*/
|
||
int32_t ad7124_setup(void)
|
||
{
|
||
int32_t ret;
|
||
uint8_t reg_nr;
|
||
|
||
// Initialize SPI
|
||
board_spi_init(AD7124);
|
||
HAL_Delay(10); // Wait for SPI to stabilize
|
||
|
||
// Reset device
|
||
ret = ad7124_reset();
|
||
if (ret < 0)
|
||
return ret;
|
||
|
||
// Wait after reset
|
||
HAL_Delay(100);
|
||
|
||
// Wait for power-on
|
||
ret = ad7124_wait_to_power_on(AD7124_RDY);
|
||
if (ret < 0)
|
||
return ret;
|
||
|
||
// Read and verify ID register
|
||
ret = ad7124_read_register(&ad7124_regs[AD7124_ID]);
|
||
if (ret < 0)
|
||
return ret;
|
||
|
||
if ((ad7124_regs[AD7124_ID].value & 0xF0) != 0x40) {
|
||
return COMM_ERR; // Invalid ID
|
||
}
|
||
|
||
// Initialize registers in sequence
|
||
// First ADC Control register - Set to standby mode initially
|
||
ad7124_regs[AD7124_ADC_CONTROL].value =
|
||
AD7124_ADC_CTRL_REG_POWER_MODE(3) | // Full power mode
|
||
AD7124_ADC_CTRL_REG_CS_EN | // Enable chip select
|
||
AD7124_ADC_CTRL_REG_DATA_STATUS | // Enable status register
|
||
AD7124_ADC_CTRL_REG_REF_EN | // Enable reference
|
||
AD7124_ADC_CTRL_REG_MODE(0); // Continuous conversion mode initially
|
||
|
||
ret = ad7124_write_register(&ad7124_regs[AD7124_ADC_CONTROL]);
|
||
if (ret < 0)
|
||
return ret;
|
||
|
||
// Then Configuration registers
|
||
ad7124_regs[AD7124_CONFIG_0].value =
|
||
AD7124_CFG_REG_BIPOLAR | // Bipolar mode
|
||
AD7124_CFG_REG_REF_BUFP | // Reference buffer positive enabled
|
||
AD7124_CFG_REG_REF_BUFM | // Reference buffer negative enabled
|
||
AD7124_CFG_REG_AIN_BUFP | // Enable positive input buffer
|
||
AD7124_CFG_REG_AINN_BUFM | // Enable negative input buffer
|
||
AD7124_CFG_REG_REF_SEL(2) | // Use internal reference
|
||
AD7124_CFG_REG_PGA(0); // Gain = 1
|
||
|
||
ret = ad7124_write_register(&ad7124_regs[AD7124_CONFIG_0]);
|
||
if (ret < 0)
|
||
return ret;
|
||
|
||
// Then Filter registers - Set for 50Hz rejection
|
||
ad7124_regs[AD7124_FILTER_0].value =
|
||
AD7124_FILT_REG_FILTER(0) | // SINC4 filter
|
||
AD7124_FILT_REG_REJ60 | // Enable 60Hz rejection
|
||
AD7124_FILT_REG_POST_FILTER(3) | // Post filter enabled
|
||
AD7124_FILT_REG_FS(1); // Output data rate
|
||
|
||
ret = ad7124_write_register(&ad7124_regs[AD7124_FILTER_0]);
|
||
if (ret < 0)
|
||
return ret;
|
||
|
||
// Initialize all channels to disabled state
|
||
for(reg_nr = AD7124_CHANNEL_0; reg_nr <= AD7124_CHANNEL_15; reg_nr++) {
|
||
ad7124_regs[reg_nr].value = 0x0000; // Disable channel
|
||
ret = ad7124_write_register(&ad7124_regs[reg_nr]);
|
||
if (ret < 0)
|
||
return ret;
|
||
}
|
||
|
||
// Verify ADC Control register
|
||
ret = ad7124_read_register(&ad7124_regs[AD7124_ADC_CONTROL]);
|
||
if (ret < 0)
|
||
return ret;
|
||
|
||
return 0;
|
||
}
|
||
|
||
/**
|
||
* @brief 通过SPI接口对AD7124进行读写操作
|
||
*
|
||
* 通过SPI接口对AD7124进行读写操作，。
|
||
*
|
||
* @param buff 指向待传输数据的指针
|
||
* @param length 待传输数据的长度
|
||
*
|
||
* @return 传输结果，成功返回0，失败返回负数
|
||
*/
|
||
int32_t ad7124_read_write_spi(uint8_t *buff, uint8_t length)
|
||
{
|
||
int32_t ret;
|
||
|
||
// 确保CS信号在传输前是高的
|
||
board_spi_cs_off(AD7124);
|
||
HAL_Delay(1); // 添加短暂延时
|
||
|
||
// 确保SPI配置正确
|
||
board_spi_init(AD7124);
|
||
|
||
// 拉低CS开始传输
|
||
board_spi_cs_on(AD7124);
|
||
HAL_Delay(1); // 添加短暂延时
|
||
|
||
// 执行SPI传输
|
||
ret = spi_transmit_receive(&hspi2, buff, length);
|
||
|
||
// 等待最后一个字节传输完成
|
||
HAL_Delay(1);
|
||
|
||
// 拉高CS结束传输
|
||
board_spi_cs_off(AD7124);
|
||
HAL_Delay(1); // 确保CS保持高电平足够长时间
|
||
|
||
return ret;
|
||
}
|
||
|
||
// 修改SPI初始化函数
|
||
|